[Python-Dev] PEP 343 and with (original) (raw)

Phillip J. Eby pje at telecommunity.com
Mon Oct 3 21:20:34 CEST 2005

At 07:02 PM 10/3/2005 +0100, Michael Hudson wrote:

"Phillip J. Eby" <pje at telecommunity.com> writes:

> Since the PEP is accepted and has patches for both its implementation and a > good part of its documentation, a major change like this would certainly > need a better rationale. Though given the amount of interest said patch has attracted (none at all)

Actually, I have been reading the patch and meant to comment on it. I was perplexed by the odd stack behavior of the new opcode until I realized that it's try/finally that's weird. :) I was planning to look into whether that could be cleaned up as well, when I got distracted and didn't go back to it.

perhaps noone cares very much and the proposal should be dropped.

I care an awful lot, as 'with' is another framework-dissolving tool that makes it possible to do more things in library form, without needing to resort to template methods. It also enables more context-sensitive programming, in that "global" states can be set and restored in a structured fashion. It may take a while to feel the effects, but it's going to be a big improvement to Python, maybe as big as new-style classes, and certainly bigger than decorators.

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